diff --git a/skin/classic/treestyletab/Linux-base.css b/skin/classic/treestyletab/Linux-base.css
index 31b67e74..6f9ccfcb 100644
--- a/skin/classic/treestyletab/Linux-base.css
+++ b/skin/classic/treestyletab/Linux-base.css
@@ -53,3 +53,9 @@
   #TabsToolbar::after {
 	display: none;
 }
+
+/* cancel too much padding for the icon in the vertical tab bar */
+#TabsToolbar[treestyletab-mode="vertical"]
+  #alltabs-button > .toolbarbutton-icon {
+	padding: 3px 7px;
+}